fix typo in workflow file

Author: leighmcculloch

.github/workflows/ci.yml

@@ -59,7 +59,7 @@ jobs:
       tag-alias-prefix: ${{ needs.setup.outputs.tag-alias-prefix }}
     secrets:
       registry: ${{ secrets.DOCKERHUB_TOKEN && 'docker.io' || 'ghcr.io' }}
-      registry_repo: ${{ github.repository) }}
+      registry_repo: ${{ github.repository }}
       registry_username: ${{ secrets.DOCKERHUB_USERNAME || github.actor }}
       registry_password: ${{ secrets.DOCKERHUB_TOKEN || github.token }}